1 /* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

     2 /*

     3  * Copyright (c) 2005,2006 INRIA

     4  *

     5  * This program is free software; you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License version 2 as 

     7  * published by the Free Software Foundation;

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program; if not, write to the Free Software

    16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    17  *

    18  * Author: Federico Maguolo <maguolof@dei.unipd.it>

    19  */

    20 #ifndef RRAA_WIFI_MANAGER_H

    21 #define RRAA_WIFI_MANAGER_H

    22 

    23 #include "ns3/nstime.h"

    24 #include "wifi-remote-station-manager.h"

    25 

    26 namespace ns3 {

    27 

    28 struct ThresholdsItem {

    29   uint32_t datarate;

    30   double pori;

    31   double pmtl;

    32   uint32_t ewnd;

    33 };

    34 

    35 typedef std::vector<ThresholdsItem> Thresholds;

    36 

    37 /**

    38  * \brief Robust Rate Adaptation Algorithm

    39  *

    40  * This is an implementation of RRAA as described in

    41  * "Robust rate adaptation for 802.11 wireless networks"

    42  * by "Starsky H. Y. Wong", "Hao Yang", "Songwu Lu", and,

    43  * "Vaduvur Bharghavan" published in Mobicom 06.

    44  */

    45 class RraaWifiManager : public WifiRemoteStationManager 

    46 {

    47 public:

    48   static TypeId GetTypeId (void);

    49 

    50   RraaWifiManager ();

    51   virtual ~RraaWifiManager ();

    52   bool OnlyBasic (void);

    53   Time GetTimeout (void) const;

    54   ThresholdsItem GetThresholds (WifiMode mode) const;

    55 private:

    56   virtual class WifiRemoteStation *CreateStation (void);  

    57   bool m_basic;

    58   Time m_timeout;

    59   uint32_t m_ewndfor54;

    60   uint32_t m_ewndfor48;

    61   uint32_t m_ewndfor36;

    62   uint32_t m_ewndfor24;

    63   uint32_t m_ewndfor18;

    64   uint32_t m_ewndfor12;

    65   uint32_t m_ewndfor9;

    66   uint32_t m_ewndfor6;

    67   double m_porifor48;

    68   double m_porifor36;

    69   double m_porifor24;

    70   double m_porifor18;

    71   double m_porifor12;

    72   double m_porifor9;

    73   double m_porifor6;

    74   double m_pmtlfor54;

    75   double m_pmtlfor48;

    76   double m_pmtlfor36;

    77   double m_pmtlfor24;

    78   double m_pmtlfor18;

    79   double m_pmtlfor12;

    80   double m_pmtlfor9;

    81 };

    82 

    83 

    84 class RraaWifiRemoteStation : public WifiRemoteStation

    85 {

    86 public:

    87   RraaWifiRemoteStation (Ptr<RraaWifiManager> stations);

    88   virtual ~RraaWifiRemoteStation ();

    89 

    90   virtual void ReportRxOk (double rxSnr, WifiMode txMode);

    91   virtual void ReportRtsFailed (void);

    92   virtual void ReportDataFailed (void);

    93   virtual void ReportRtsOk (double ctsSnr, WifiMode ctsMode, double rtsSnr);

    94   virtual void ReportDataOk (double ackSnr, WifiMode ackMode, double dataSnr);

    95   virtual void ReportFinalRtsFailed (void);

    96   virtual void ReportFinalDataFailed (void);

    97   virtual bool NeedRts (Ptr<const Packet> packet);

    98 

    99 private:

   100   virtual Ptr<WifiRemoteStationManager> GetManager (void) const;

   101   virtual WifiMode DoGetDataMode (uint32_t size);

   102   virtual WifiMode DoGetRtsMode (void);

   103   uint32_t GetMaxRate (void);

   104   uint32_t GetMinRate (void);

   105   ThresholdsItem GetThresholds (uint32_t rate);

   106   void CheckTimeout (void);

   107   void RunBasicAlgorithm (void);

   108   void ARts (void);

   109   void ResetCountersBasic (void);

   110 

   111   uint32_t m_counter;

   112   uint32_t m_failed;

   113   uint32_t m_rtsWnd;

   114   uint32_t m_rtsCounter;

   115   Time m_lastReset;

   116   bool m_rtsOn;

   117   bool m_lastFrameFail;

   118   bool m_initialized;

   119 

   120   uint32_t m_rate;

   121 

   122   Ptr<RraaWifiManager> m_stations;

   123 };

   124 

   125 } // namespace ns3

   126 

   127 #endif /* RRAA_WIFI_MANAGER_H */